Comment 38 for bug 524281

I have installed two mainline kernels (http://kernel.ubuntu.com/~kernel-ppa/mainline/), .31 & 33, just to see if those kernels made any change in the number of wakeup calls. Both kernels had about the same number of wakeups as the Lucid kernel (.32), which led me to wonder whether or not this could be an userspace bug.

Both kernels made Powertop report :
   28,1% ( 7,2) [kernel scheduler] Load balancing tick
   27,7% ( 7,1) [kernel core] hrtimer_start (tick_sched_timer)

The fact of the mather is that mainline kernels (at least the ones from the ppa) are not making things better.
Luckily kernel developer Suresh Siddha is working on a patch, that simply has to be backported to Lucid.

These kernel wakeups have to be sorted out, since they are one of the reasons why Linux power consumption is much higher than on other platforms.